Here is the Kal Online guide for Titans' archer , if you also want to do this build you can read the following information as a reference .
Bow vs. Crosbow
this is quite a simple argument, if skills were used less often and various attack speed enhancements etc. weren't so easy to get and more skills needed cast times then bows would have more use with their quick attack and cast speed.
However this is not the case and skills like rain of arrows and sharp & continuous arrow and snipe (with its % dmg) take over in both pvp and pve. this means the more dmg u can do with each individual hit more important (and can become the difference between a 2 or 3 hit kill and a 3 or 4 hit kill). so basically use a crossbow especially once u get all your skills in kalonline geons.
Sword and Dagger vs. Two Handed Sword
another equally simple argument. since you rarely use physical attacks then it is sword and dagger all the way for maximum option potential. (oh yeah!)
heavy leather armor vs. lightweight armor
another fairly simple comparison though without a definate answer. use heavy leather for more magic defense and lghtweight armor for more physical defence (the difference is really negligable since it really depends on the +upgrade of your armor.
ok only slight differencces with other builds you might have seen. one being in the battle tree, shout of air. i like it. mainly so i can declutter the area around me, slow mobs whilst waiting for cooldowns and for funnies. I have increased all my buffs except the critical buff because with added options you can pretty much get all the extra crit chance you need.
ok now for a top tip in fighting. one thing i have noticed is the ability using sharp arrowhead and continuous shot along with you normal attack to do 4 hits in the time it takes to normally do two.
Its kinda hard to explain but ill do my best. First you need to be out of range of your opponent, then you have to activate ur normal attack. NOW as you get within range and you start attacking your opponent, fire of sharp arrowhead, a split second after ur 1st shot u shud see sharp arrowhead do dmg, spam your continuous shot's hotkey and the same thing will happen again with that skills. ta daaaa 4 shots for the price of two in Kal Online Geons! Oh yeah! PH34R US :D
ever wondered how to kill a boss mob with the upmost ease? well ther is a simple skill chain to let you do this. 1st thing to do is blind shot them, then cast either snipe or rain of arrows (RoA is best but u might not have the time) and if its RoA then cast it between u and the boss. now cast shadow of soul and run away from the fake boss. by the time the dummy is dead u can repeat the whole process. in theory you wont take any damage.